---
title: What would happen to hermit crabs if people took every empty shell h… — What a habitat is: home, food, shelter… · tree and pragmatics
description: What would happen to hermit crabs if people took every empty shell home from the beach? Test 5 of lesson 1 «What a habitat is: home, food, shelter and fitting in» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice
---

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# Test 5 · What a habitat is: home, food, shelter and fitting in

<!-- .ven lang=en -->
What would happen to hermit crabs if people took every empty shell home from the beach?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** people · **What happens:** happen, take · **To what, where:** empty shell, beach

<!-- .vabout -->
This is test 5 of lesson 1 «What a habitat is: home, food, shelter and fitting in» of the biology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/1-what-a-habitat-is/#t5).

## The question {#question}

```conllu
# sent_id = question:biology:1-what-a-habitat-is:t5:1
# text = What would happen to hermit crabs if people took every empty shell home from the beach?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	to	to	ADP	IN	_	6	case	_	_
5	hermit	hermit	NOUN	NN	Number=Sing	6	compound	_	_
6	crabs	crab	NOUN	NNS	Number=Plur	3	obl	_	_
7	if	if	SCONJ	IN	_	9	mark	_	_
8	people	people	NOUN	NNS	Number=Plur	9	nsubj	_	_
9	took	take	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	3	advcl	_	_
10	every	every	DET	DT	PronType=Tot	12	det	_	_
11	empty	empty	ADJ	JJ	Degree=Pos	12	amod	_	_
12	shell	shell	NOUN	NN	Number=Sing	9	obj	_	_
13	home	home	ADV	RB	_	9	advmod	_	_
14	from	from	ADP	IN	_	16	case	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	beach	beach	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
17	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  | to hermit crabs | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **take** *a condition, not said to happen* | past | people | every empty shell |  | the beach |  | home *property* | vn bring-11.3 «NP V NP PP.initial\_location»: agent=Agent shell=Theme from beach=Initial\_Location |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Hermit crabs would grow their own shells

```conllu
# sent_id = question:biology:1-what-a-habitat-is:t5:o1:1
# text = Hermit crabs would grow their own shells
1	Hermit	hermit	NOUN	NN	Number=Sing	2	compound	_	_
2	crabs	crab	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	grow	grow	VERB	VB	VerbForm=Inf	0	root	_	_
5	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
6	own	own	ADJ	JJ	Degree=Pos	7	amod	_	_
7	shells	shell	NOUN	NNS	Number=Plur	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | would | Hermit crabs | crabs's own shells |  |  |  |  | vn appear-48.1.1 «PP.location V NP»: agent=Location shell=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Nothing, they live happily without shells

```conllu
# sent_id = question:biology:1-what-a-habitat-is:t5:o2:1
# text = Nothing, they live happily without shells
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	4	vocative	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	_	_
4	live	live	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	happily	happily	ADV	RB	_	4	advmod	_	_
6	without	without	ADP	IN	_	7	case	_	_
7	shells	shell	NOUN	NNS	Number=Plur	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **live** | present | they |  |  |  |  | without shells; Nothing *vocative*; happily *property* | vn exist-47.1-1 «NP V»: agent=Theme |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Crabs would have nowhere safe to grow into, and many would be eaten

```conllu
# sent_id = question:biology:1-what-a-habitat-is:t5:o3:1
# text = Crabs would have nowhere safe to grow into, and many would be eaten
1	Crabs	crab	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	have	have	VERB	VB	VerbForm=Inf	0	root	_	_
4	nowhere	nowhere	ADV	RB	PronType=Neg	3	advmod	_	_
5	safe	safe	ADJ	JJ	Degree=Pos	3	xcomp	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	grow	grow	VERB	VB	VerbForm=Inf	5	xcomp	_	_
8	into	into	ADP	IN	_	7	obl	_	SpaceAfter=No
9	,	,	PUNCT	,	_	14	punct	_	_
10	and	and	CCONJ	CC	_	14	cc	_	_
11	many	many	ADJ	JJ	Degree=Pos	14	nsubj:pass	_	_
12	would	would	AUX	MD	VerbForm=Fin	14	aux	_	_
13	be	be	AUX	VB	VerbForm=Inf	14	aux:pass	_	_
14	eaten	eat	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | would | Crabs |  |  |  |  | nowhere, safe *property* | vn birth-28.2-1 «NP V NP»: agent=Agent |
| 2 | **grow** | to-infinitive | Crabs *not said here* |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 3 | **eat** | would · passive |  | many |  |  |  |  | vn eat-39.1-1 «NP V NP»: subject=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
They would move into sand holes instead with no trouble at all, and be just as safe

<!-- fold The tree, 17 words -->
```conllu
# sent_id = question:biology:1-what-a-habitat-is:t5:o4:1
# text = They would move into sand holes instead with no trouble at all, and be just as safe
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	move	move	VERB	VB	VerbForm=Inf	0	root	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	sand	sand	NOUN	NN	Number=Sing	6	compound	_	_
6	holes	hole	NOUN	NNS	Number=Plur	3	obl	_	_
7	instead	instead	ADV	RB	_	10	advmod	_	_
8	with	with	ADP	IN	_	10	case	_	_
9	no	no	DET	DT	PronType=Neg	10	det	_	_
10	trouble	trouble	NOUN	NN	Number=Sing	3	obl	_	_
11	at	at	ADP	IN	_	12	case	_	_
12	all	all	DET	DT	PronType=Tot	10	nmod	_	SpaceAfter=No
13	,	,	PUNCT	,	_	18	punct	_	_
14	and	and	CCONJ	CC	_	18	cc	_	_
15	be	be	AUX	VB	VerbForm=Inf	18	cop	_	_
16	just	just	ADV	RB	_	18	advmod	_	_
17	as	as	ADV	RB	_	18	advmod	_	_
18	safe	safe	ADJ	JJ	Degree=Pos	3	parataxis	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | would | They |  |  | sand holes |  | with no trouble at all | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into hole=Trajectory |
| 2 | **is** | infinitive |  |  |  |  |  | safe *property* | tree rules |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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